As others have said, he is just being a control freak. He wants to be out on his own having fun as long as you are simply boo-hooing in the house without a life. You are doing nothing wrong by going out and having fun. You don't owe him details, he is no longer living with you.
Your GAL is good for your own physical and emotional well being and, in it's own way, it is making you more attractive to your H. He's paying attention to you.
